例子所用完整依赖
<properties> <itext.version>7.1.11</itext.version> <itext.pdfhtml.version>3.0.0</itext.pdfhtml.version> <itext.pdfrender.version>1.0.1</itext.pdfrender.version> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> </properties> <dependencies> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.8</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.itextpdf</groupId> <artifactId>itext7-core</artifactId> <version>${itext.version}</version> <type>pom</type> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-nop</artifactId> <version>1.7.24</version> </dependency> <dependency> <groupId>com.itextpdf</groupId> <artifactId>html2pdf</artifactId> <version>${itext.pdfhtml.version}</version> </dependency> <dependency> <groupId>org.xhtmlrenderer</groupId> <artifactId>flying-saucer-pdf</artifactId> <version>9.0.7</version> </dependency> <!-- https://mvnrepository.com/artifact/org.freemarker/freemarker --> <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> </dependency> <dependency> <groupId>cn.hutool</groupId> <artifactId>hutool-all</artifactId> <version>5.3.7</version> </dependency> </dependencies> 生成HTML可选依赖 方式一： <dependency> <groupId>org.freemarker</groupId> <artifactId>freemarker</artifactId> <version>2.3.30</version> </dependency>或
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-freemarker</artifactId> </dependency>备注：最好使用springboot加载器加载，不然设置freemarker模板路径要特殊处理，不然jar运行时会找不到路径
package org.hu.itext.htmlpdf; import com.itextpdf.html2pdf.ConverterProperties; import com.itextpdf.html2pdf.HtmlConverter; import com.itextpdf.io.font.FontProgram; import com.itextpdf.io.font.FontProgramFactory; import com.itextpdf.io.font.PdfEncodings; import com.itextpdf.io.font.constants.StandardFonts; import com.itextpdf.io.image.ImageData; import com.itextpdf.io.image.ImageDataFactory; import com.itextpdf.kernel.colors.ColorConstants; import com.itextpdf.kernel.events.Event; import com.itextpdf.kernel.events.IEventHandler; import com.itextpdf.kernel.events.PdfDocumentEvent; import com.itextpdf.kernel.font.PdfFont; import com.itextpdf.kernel.font.PdfFontFactory; import com.itextpdf.kernel.pdf.PdfDocument; import com.itextpdf.kernel.pdf.PdfPage; import com.itextpdf.kernel.pdf.PdfWriter; import com.itextpdf.kernel.pdf.WriterProperties; import com.itextpdf.kernel.pdf.canvas.PdfCanvas; import com.itextpdf.kernel.pdf.extgstate.PdfExtGState; import com.itextpdf.layout.Canvas; import com.itextpdf.layout.element.Paragraph; import com.itextpdf.layout.font.FontProvider; import com.itextpdf.layout.font.FontSet; import com.itextpdf.layout.property.Property; import com.itextpdf.layout.property.TextAlignment; import com.itextpdf.layout.property.UnitValue; import com.itextpdf.layout.property.VerticalAlignment; import com.itextpdf.text.PageSize; import com.itextpdf.text.Rectangle; import freemarker.template.Configuration; import freemarker.template.Template; import freemarker.template.TemplateException; import lombok.extern.slf4j.Slf4j; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.FileWriter; import java.io.IOException; import java.io.InputStream; import java.io.Writer; import java.nio.file.Files; import java.nio.file.Paths; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.UUID; /** * @Description 所用的资源文件可在github上找到 * @Author huqy * @Date 2020/07/04 */ @Slf4j public class CreateHtml { //resources目录下 private static final String TEMPLATE_DIR = "/htmlpdf"; private static final String TEMPLATE_FILE_NAME = "CheckInfo.ftl"; //生成html的位置 private static final String HTML_FILE_PATH = "/tmp/mortgage/html/%s.html"; private static final String LOGO_PATH = "htmlpdf/logo.png"; //中文字体 注意后边要加,0 具体我也不知道为啥 有小伙伴知道可留言 public static final String FONT = "htmlpdf/simsun.ttc,0"; public static final String DEST = "/tmp/mortgage/html/Accessibility.pdf"; public static void main(String[] args) { String htmlpath = getHtml(); getPdf(htmlpath); deleteHtml(htmlpath); } private static void getPdf(String htmlpath) { // 可写到本地也可通过http输出流输出 // HttpServletResponse resp = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getResponse(); // resp.setContentType("application/octet-stream"); // try { // resp.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(UUID.randomUUID().toString()+FILE_NAME_SUFFIX, "UTF-8")); // } catch (UnsupportedEncodingException e) { // log.warn("查询结果生成PDF：",e); // } File file = new File(DEST); file.getParentFile().mkdirs(); try (FileInputStream fileInputStream = new FileInputStream(htmlpath)) { FileOutputStream outputStream = new FileOutputStream(file); WriterProperties writerProperties = new WriterProperties(); // http输出流输出 // PdfWriter pdfWriter = new PdfWriter(resp.getOutputStream(), writerProperties); PdfWriter pdfWriter = new PdfWriter(outputStream, writerProperties); PdfDocument pdfDoc = new PdfDocument(pdfWriter); //转换为pfd中的属性设置对象 ConverterProperties proper = new ConverterProperties(); //字体设置，解决中文不显示问题 FontSet fontSet = new FontSet(); FontProgram font = FontProgramFactory.createFont(FONT); fontSet.addFont(font, PdfEncodings.IDENTITY_H); FontProvider fontProvider = new FontProvider(fontSet); proper.setFontProvider(fontProvider); //添加水印 pdfDoc.addEventHandler(PdfDocumentEvent.END_PAGE, new PDFEventHandler()); HtmlConverter.convertToPdf(fileInputStream, pdfDoc, proper); pdfDoc.close(); } catch (IOException e) { e.printStackTrace(); } } private static String getHtml() { Param param1 = new Param(); param1.setA("我是A"); param1.setB("我是B"); List<String> param2 = new ArrayList<>(); param2.add("数组第一个元素"); param2.add("数组第二个元素"); // 定义数据 Map<String, Object> root = new HashMap<>(); root.put("param1", param1); root.put("param2", param2); Configuration conf = new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS); //加载模板文件(模板的路径) Writer out = null; // 定义输出 UUID uuid = UUID.randomUUID(); String htmlFilePath = String.format(HTML_FILE_PATH, uuid.toString()); try { //如果不是启动器引入的依赖，这里需要这样写 conf.setClassForTemplateLoading(CreateHtml.class,TEMPLATE_DIR); // 加载模板 Template template = conf.getTemplate(TEMPLATE_FILE_NAME); File file = new File(htmlFilePath); file.getParentFile().mkdirs(); out = new FileWriter(file); template.process(root, out); return htmlFilePath; } catch (IOException | TemplateException e) { log.warn("生成HTML模板失败：{} e:", htmlFilePath,e); } finally { if (out != null) { try { out.close(); } catch (IOException e) { log.warn("生成HTML模板失败：{} e:", htmlFilePath,e); } } } return null; } /** * PDF事件触发器 * 生成水印 */ static class PDFEventHandler implements IEventHandler { private static final String WATERMARK_CONTENT = "操作员姓名：%s 操作员号：%s"; PdfFont helveticaBold = PdfFontFactory.createFont(StandardFonts.HELVETICA_BOLD); private PDFEventHandler() throws IOException { } @Override public void handleEvent(Event event) { PdfDocumentEvent docEvent = (PdfDocumentEvent) event; PdfDocument pdfDoc = docEvent.getDocument(); PdfPage page = docEvent.getPage(); PdfCanvas pdfCanvas = new PdfCanvas(page.newContentStreamBefore(), page.getResources(), pdfDoc); String format = String.format(WATERMARK_CONTENT, "二狗", "9527"); //Add watermark Canvas canvas = new Canvas(pdfCanvas, page.getPageSize()); canvas.setFontColor(ColorConstants.GRAY); canvas.setProperty(Property.FONT_SIZE, UnitValue.createPointValue(20)); canvas.setProperty(Property.FONT, helveticaBold); PdfFont f = null; ImageData image = null; try { f = PdfFontFactory.createFont(FONT, PdfEncodings.IDENTITY_H); InputStream in = this.getClass().getClassLoader().getResourceAsStream(LOGO_PATH); //这里需要使用这个方法的byte[]的重载方法 不然jar启动会报错找不到文件 image = ImageDataFactory.create(toByteArray(in)); } catch (IOException e) { e.printStackTrace(); } canvas.showTextAligned(new Paragraph(format).setFont(f), 298, 421, pdfDoc.getPageNumber(page), TextAlignment.CENTER, VerticalAlignment.MIDDLE, 45); //添加背景 pdfCanvas.saveState(); PdfExtGState state = new PdfExtGState().setFillOpacity(0.1f); pdfCanvas.setExtGState(state); Rectangle rotate = PageSize.A4.rotate(); pdfCanvas.addImage(image, rotate.getWidth() / 8, rotate.getHeight() / 2, 400, false); pdfCanvas.restoreState(); pdfCanvas.release(); } } public static byte[] toByteArray(InputStream input) throws IOException { ByteArrayOutputStream output = new ByteArrayOutputStream(); byte[] buffer = new byte[1024*4]; int n = 0; while (-1 != (n = input.read(buffer))) { output.write(buffer, 0, n); } return output.toByteArray(); } /** * 移除生成的HTML * * @param htmlPath */ private static void deleteHtml(String htmlPath) { try { Files.delete(Paths.get(htmlPath)); } catch (IOException e) { log.warn("删除HTML文件失败：path：{}, e:", htmlPath, e); } } } package org.hu.itext.htmlpdf; /** * 上一个所用参数bean */ public class Param{ private String a; private String b; public String getA() { return a; } public void setA(String a) { this.a = a; } public String getB() { return b; } public void setB(String b) { this.b = b; } }源码位置：https://github.com/G01Hu/Itext
